From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Two cases of broken valve springs on F.2.B. Chassis engines.
| Identifier | ExFiles\Box 17\6\ Scan047 | |
| Date | 28th June 1928 | |
| X7060 Hs{Lord Ernest Hives - Chair} Mx{John H Maddocks - Chief Proving Officer}/McM3/T28.6.28. re F.2.B.Chassis We have had 2 cases of broken valve springs on engines of the above series. 1 on Unit test at 2250 r.p.m. 1 discovered during 1 in 10 inspection i.e. after unit test. Mx{John H Maddocks - Chief Proving Officer}/McM | ||